/*
$Log$
+Revision 1.10 2005/12/15 08:55:32 decaro
+New TOF geometry description (V5) -G. Cara Romeo and A. De Caro
+
+Revision 1.9.1 2005/07/19 A. De Caro
+ Created daughter-classes AliTOFGeometryV4 and AliTOFGeometryV5
+ => moved global methods IsInsideThePad, DistanceToPad,
+ GetPlate, GetSector, GetStrip, GetPadX, GetPadZ,
+ GetX, GetY, GetZ, GetPadDx, GetPadDy and GetPadDz
+ in daughter-classes
+
+Revision 1.9 2005/10/20 12:41:35 hristov
+Implementation of parallel tracking. It is not the default version, one can use it passing option MI from AliReconstruction to TOF (M.Ivanov)
+
+Revision 1.8 2004/11/29 08:28:01 decaro
+Introduction of a new TOF constant (i.e. TDC bin width)
+
+Revision 1.7 2004/11/05 07:20:08 decaro
+TOF library splitting and conversion of some printout messages in AliLog schema (T.Kuhr)
+
Revision 1.6 2004/06/15 15:27:59 decaro
TOF raw data: preliminary implementation and style changes
const Int_t AliTOFGeometry::fgkTimeDiff = 25000; // Min signal separation (ps)
-const Float_t AliTOFGeometry::fgkxTOF = 371.; // Inner radius of the TOF for Reconstruction (cm)
-const Float_t AliTOFGeometry::fgkRmin = 370.; // Inner radius of the TOF (cm)
-const Float_t AliTOFGeometry::fgkRmax = 399; // Outer radius of the TOF (cm)
-const Float_t AliTOFGeometry::fgkZlenA = 106.0; // length (cm) of the A module
-const Float_t AliTOFGeometry::fgkZlenB = 141.0; // length (cm) of the B module
-const Float_t AliTOFGeometry::fgkZlenC = 177.5; // length (cm) of the C module
const Float_t AliTOFGeometry::fgkXPad = 2.5; // Pad size in the x direction (cm)
const Float_t AliTOFGeometry::fgkZPad = 3.5; // Pad size in the z direction (cm)
-const Float_t AliTOFGeometry::fgkMaxhZtof = 371.5; // Max half z-size of TOF (cm)
-const Float_t AliTOFGeometry::fgkStripLength = 122.;// Strip Length (rho X phi direction) (cm)
-const Float_t AliTOFGeometry::fgkDeadBndX = 1.0; // Dead Boundaries of a Strip along X direction (length) (cm)
-const Float_t AliTOFGeometry::fgkDeadBndZ = 1.5; // Dead Boundaries of a Strip along Z direction (width) (cm)
-const Float_t AliTOFGeometry::fgkOverSpc = 15.3; // Space available for sensitive layers in radial direction (cm)
-
-const Float_t AliTOFGeometry::fgkSigmaForTail1= 2.;//Sig1 for simulation of TDC tails
+const Float_t AliTOFGeometry::fgkSigmaForTail1= 2.; //Sig1 for simulation of TDC tails
const Float_t AliTOFGeometry::fgkSigmaForTail2= 0.5;//Sig2 for simulation of TDC tails
-const Float_t AliTOFGeometry::fgkSpeedOfLight = 0.299792458;// c (10^9 m/s)
-const Float_t AliTOFGeometry::fgkPionMass = 0.13957;// pion mass (Gev/c^2)
-const Float_t AliTOFGeometry::fgkKaonMass = 0.49368;// kaon mass (Gev/c^2)
-const Float_t AliTOFGeometry::fgkProtonMass = 0.93827;// proton mass (Gev/c^2)
-const Float_t AliTOFGeometry::fgkElectronMass = 0.00051;// electron mass (Gev/c^2)
-const Float_t AliTOFGeometry::fgkMuonMass = 0.10566;// muon mass (Gev/c^2)
-
-const Float_t AliTOFGeometry::fgkDprecMin = 0.0000075;//num.prec.tolerance on Thmin
-const Float_t AliTOFGeometry::fgkDprecMax = 0.0000100;//num.prec.tolerance on Thma
-const Float_t AliTOFGeometry::fgkDprecCen = 0.0000005;//num.prec.tolerance on <Theta>
+const Float_t AliTOFGeometry::fgkTdcBin = 24.4; // time-window for the TDC bins [ps]
//_____________________________________________________________________________
AliTOFGeometry::AliTOFGeometry()
//
// AliTOFGeometry default constructor
//
+
+ kNStripC = 20; // number of strips in C type module
+ kMaxNstrip = 20; // Max. number of strips
+ kZlenA = 106.0; // length (cm) of the A module
+ kZlenB = 141.0; // length (cm) of the B module
+ kZlenC = 177.5; // length (cm) of the C module
+ kMaxhZtof = 371.5; // Max half z-size of TOF (cm)
+ kStripLength = 122.;// Strip Length (rho X phi direction) (cm)
+
+ fgkxTOF = 371.; // Inner radius of the TOF for Reconstruction (cm)
+ fgkRmin = 370.; // Inner radius of the TOF (cm)
+ fgkRmax = 399.; // Outer radius of the TOF (cm)
+
Init();
}
//
// Initialize strip Tilt Angles and Heights
//
- // Strips Tilt Angles
- Float_t const kangles[kNPlates][kMaxNstrip] ={
-
- {44.494, 43.725, 42.946, 42.156, 41.357, 40.548, 39.729, 38.899,
- 38.060, 37.211, 36.353, 35.484, 34.606, 33.719, 32.822, 31.916,
- 31.001, 30.077, 29.144, 28.202 },
-
- {26.884, 25.922, 24.952, 23.975, 22.989, 22.320, 21.016, 20.309,
- 19.015, 18.270, 16.989, 16.205, 14.941, 14.117, 12.871, 12.008,
- 10.784, 9.8807, 8.681, 0.0 },
-
- { 7.5835, 6.4124, 5.4058, 4.2809, 3.2448, 2.1424, 1.078, -0., -1.078,
- -2.1424, -3.2448, -4.2809, -5.4058, -6.4124, -7.5835, 0.0, 0.0, 0.0,
- 0.0, 0.0 },
-
- {-8.681, -9.8807, -10.784, -12.008, -12.871, -14.117, -14.941, -16.205,
- -16.989, -18.27, -19.015, -20.309, -21.016, -22.32, -22.989,
- -23.975, -24.952, -25.922, -26.884, 0. },
-
- {-28.202, -29.144, -30.077, -31.001, -31.916, -32.822, -33.719, -34.606,
- -35.484, -36.353, -37.211, -38.06, -38.899, -39.729, -40.548,
- -41.357, -42.156, -42.946, -43.725, -44.494 }};
-
-
- //Strips Heights
-
- Float_t const kheights[kNPlates][kMaxNstrip]= {
-
- {-5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5,
- -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5 },
-
- {-6.3, -7.1, -7.9, -8.7, -9.5, -3, -9.5, -3, -9.5, -3,
- -9.5, -3.0, -9.5, -3.0, -9.5, -3, -9.5, -3, -9 , 0.},
-
- { -3, -9, -4.5, -9, -4.5, -9, -4.5, -9, -4.5, -9,
- -4.5, -9, -4.5, -9, -3, 0.0, 0.0, 0.0, 0.0, 0.0 },
-
- { -9, -3, -9.5, -3, -9.5, -3, -9.5, -3, -9.5, -3, -9.5,
- -3, -9.5, -3, -9.5, -8.7, -7.9, -7.1, -6.3, 0. },
-
- {-5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5,
- -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5 }};
-
-
- // Deposit in fAngles, fHeights
-
- for (Int_t iplate = 0; iplate < kNPlates; iplate++) {
- for (Int_t istrip = 0; istrip < kMaxNstrip; istrip++) {
- fAngles[iplate][istrip] = kangles[iplate][istrip];
- fHeights[iplate][istrip] = kheights[iplate][istrip];
- }
- }
-
fPhiSec = 360./kNSectors;
-}
-
-//_____________________________________________________________________________
-Float_t AliTOFGeometry::DistanceToPad(Int_t *det, Float_t *pos)
-{
-//
-// Returns distance of space point with coor pos (x,y,z) (cm) wrt
-// pad with Detector Indices idet (iSect,iPlate,iStrip,iPadX,iPadZ)
-//
-
- //Transform pos into Sector Frame
-
- Float_t x = pos[0];
- Float_t y = pos[1];
- Float_t z = pos[2];
-
- Float_t radius = TMath::Sqrt(x*x+y*y);
- Float_t phi=TMath::ATan2(y,x);
- if(phi<0) phi=2.*TMath::Pi()+phi;
- // Get the local angle in the sector philoc
- Float_t angle = phi*kRaddeg-( Int_t (kRaddeg*phi/20.) + 0.5)*fPhiSec;
- Float_t xs = radius*TMath::Cos(angle/kRaddeg);
- Float_t ys = radius*TMath::Sin(angle/kRaddeg);
- Float_t zs = z;
-
- // Do the same for the selected pad
-
- Float_t g[3];
- GetPos(det,g);
-
- Float_t padRadius = TMath::Sqrt(g[0]*g[0]+g[1]*g[1]);
- Float_t padPhi=TMath::ATan2(g[1],g[0]);
- if(padPhi<0) padPhi=2.*TMath::Pi()+padPhi;
- // Get the local angle in the sector philoc
- Float_t padAngle = padPhi*kRaddeg-( Int_t (padPhi*kRaddeg/20.)+ 0.5) * fPhiSec;
- Float_t padxs = padRadius*TMath::Cos(padAngle/kRaddeg);
- Float_t padys = padRadius*TMath::Sin(padAngle/kRaddeg);
- Float_t padzs = g[2];
-
- //Now move to local pad coordinate frame. Translate:
-
- Float_t xt = xs-padxs;
- Float_t yt = ys-padys;
- Float_t zt = zs-padzs;
- //Now Rotate:
-
- Float_t alpha = GetAngles(det[1],det[2]);
- Float_t xr = xt*TMath::Cos(alpha/kRaddeg)+zt*TMath::Sin(alpha/kRaddeg);
- Float_t yr = yt;
- Float_t zr = -xt*TMath::Sin(alpha/kRaddeg)+zt*TMath::Cos(alpha/kRaddeg);
-
- Float_t dist = TMath::Sqrt(xr*xr+yr*yr+zr*zr);
- return dist;
-
-}
-
-
-//_____________________________________________________________________________
-Bool_t AliTOFGeometry::IsInsideThePad(Int_t *det, Float_t *pos)
-{
-//
-// Returns true if space point with coor pos (x,y,z) (cm) falls
-// inside pad with Detector Indices idet (iSect,iPlate,iStrip,iPadX,iPadZ)
-//
-
- Bool_t isInside=false;
-
-
- //Transform pos into Sector Frame
-
- Float_t x = pos[0];
- Float_t y = pos[1];
- Float_t z = pos[2];
-
- Float_t radius = TMath::Sqrt(x*x+y*y);
- Float_t phi=TMath::ATan2(y,x);
- if(phi<0) phi=2.*TMath::Pi()+phi;
- // Get the local angle in the sector philoc
- Float_t angle = phi*kRaddeg-( Int_t (kRaddeg*phi/20.) + 0.5) *fPhiSec;
- Float_t xs = radius*TMath::Cos(angle/kRaddeg);
- Float_t ys = radius*TMath::Sin(angle/kRaddeg);
- Float_t zs = z;
-
- // Do the same for the selected pad
-
- Float_t g[3];
- GetPos(det,g);
-
- Float_t padRadius = TMath::Sqrt(g[0]*g[0]+g[1]*g[1]);
- Float_t padPhi=TMath::ATan2(g[1],g[0]);
- if(padPhi<0) padPhi=2.*TMath::Pi()+padPhi;
- // Get the local angle in the sector philoc
- Float_t padAngle = padPhi*kRaddeg-( Int_t (padPhi*kRaddeg/20.)+ 0.5) * fPhiSec;
- Float_t padxs = padRadius*TMath::Cos(padAngle/kRaddeg);
- Float_t padys = padRadius*TMath::Sin(padAngle/kRaddeg);
- Float_t padzs = g[2];
-
- //Now move to local pad coordinate frame. Translate:
-
- Float_t xt = xs-padxs;
- Float_t yt = ys-padys;
- Float_t zt = zs-padzs;
- //Now Rotate:
-
- Float_t alpha = GetAngles(det[1],det[2]);
- Float_t xr = xt*TMath::Cos(alpha/kRaddeg)+zt*TMath::Sin(alpha/kRaddeg);
- Float_t yr = yt;
- Float_t zr = -xt*TMath::Sin(alpha/kRaddeg)+zt*TMath::Cos(alpha/kRaddeg);
-
- if(TMath::Abs(xr)<=0.75 && TMath::Abs(yr)<= (fgkXPad*0.5) && TMath::Abs(zr)<= (fgkZPad*0.5))
- isInside=true;
- return isInside;
}
}
//_____________________________________________________________________________
-Float_t AliTOFGeometry::GetX(Int_t *det)
-{
- //
- // Returns X coordinate (cm)
- //
-
- Int_t isector = det[0];
- Int_t iplate = det[1];
- Int_t istrip = det[2];
- Int_t ipadz = det[3];
- Int_t ipadx = det[4];
-
- // Find out distance d on the plane wrt median phi:
- Float_t d = (ipadx+0.5)*fgkXPad-(kNpadX*fgkXPad)*0.5;
-
- // The radius r in xy plane:
- Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+
- (ipadz-0.5)*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25;
-
- // local azimuthal angle in the sector philoc
- Float_t philoc = TMath:: ATan(d/r);
-
- // azimuthal angle in the global frame phi
- Float_t phi = philoc*kRaddeg+(isector+0.5 )*fPhiSec;
-
- Float_t xCoor = r/TMath::Cos(philoc)*TMath::Cos(phi/kRaddeg);
- return xCoor;
-
-}
-//_____________________________________________________________________________
-Float_t AliTOFGeometry::GetY(Int_t *det)
-{
- //
- // Returns Y coordinate (cm)
- //
-
- Int_t isector = det[0];
- Int_t iplate = det[1];
- Int_t istrip = det[2];
- Int_t ipadz = det[3];
- Int_t ipadx = det[4];
-
- // Find out distance d on the plane wrt median phi:
- Float_t d = (ipadx+0.5)*fgkXPad-(kNpadX*fgkXPad)*0.5;
-
- // The radius r in xy plane:
- Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+
- (ipadz-0.5)*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25;
-
- // local azimuthal angle in the sector philoc
- Float_t philoc = TMath:: ATan(d/r);
-
- // azimuthal angle in the global frame phi
- Float_t phi = philoc*kRaddeg+(isector+0.5 )*fPhiSec;
-
- Float_t yCoor = r/TMath::Cos(philoc)*TMath::Sin(phi/kRaddeg);
- return yCoor;
-
-}
-
-//_____________________________________________________________________________
-Float_t AliTOFGeometry::GetZ(Int_t *det)
-{
- //
- // Returns Z coordinate (cm)
- //
-
- Int_t iplate = det[1];
- Int_t istrip = det[2];
- Int_t ipadz = det[3];
-
-
- // The radius r in xy plane:
- Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip];
-
- Float_t zCoor = r*TMath::Tan(0.5*TMath::Pi()-GetStripTheta(iplate,istrip))-
- (ipadz-0.5)*fgkZPad*TMath::Cos(fAngles[iplate][istrip]/kRaddeg);
- return zCoor;
-
-}
-//_____________________________________________________________________________
-Int_t AliTOFGeometry::GetSector(Float_t *pos)
-{
- //
- // Returns the Sector index
- //
-
- Int_t iSect = -1;
-
- Float_t x = pos[0];
- Float_t y = pos[1];
-
- Float_t phi = TMath::ATan2(y,x);
- if(phi<0.) phi=2.*TMath::Pi()+phi;
- iSect = (Int_t) (phi*kRaddeg/fPhiSec);
-
- return iSect;
-
-}
-//_____________________________________________________________________________
-Int_t AliTOFGeometry::GetPadX(Float_t *pos)
-{
- //
- // Returns the Pad index along X
- //
-
- Int_t iPadX = -1;
-
- Float_t x = pos[0];
- Float_t y = pos[1];
- Float_t z = pos[2];
-
- Int_t isector = GetSector(pos);
- if(isector == -1){
- AliError("Detector Index could not be determined");
- return iPadX;}
- Int_t iplate = GetPlate(pos);
- if(iplate == -1){
- AliError("Detector Index could not be determined");
- return iPadX;}
- Int_t istrip = GetStrip(pos);
- if(istrip == -1){
- AliError("Detector Index could not be determined");
- return iPadX;}
-
-
- Float_t rho=TMath::Sqrt(x*x+y*y);
- Float_t phi = TMath::ATan2(y,x);
- if(phi<0.) phi=2.*TMath::Pi()+phi;
-
- // Get the local angle in the sector philoc
- Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec;
- philoc*=TMath::Pi()/180.;
- // theta projected on the median of the sector
- Float_t theta = TMath::ATan2(rho*TMath::Cos(philoc),z);
- // The radius r in xy plane:
- Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+
- (theta-GetStripTheta(iplate, istrip))/
- (GetMaxStripTheta(iplate, istrip)-GetMinStripTheta(iplate, istrip))
- * 2.*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25;
-
- // Find out distance projected onto the strip plane
- Float_t d = (r*TMath::Tan(philoc)+(kNpadX*fgkXPad)*0.5);
-
- iPadX = (Int_t) ( d/fgkXPad);
- return iPadX;
-
-}
-//_____________________________________________________________________________
-Int_t AliTOFGeometry::GetPlate(Float_t *pos)
-{
- //
- // Returns the Plate index
- //
- Int_t iPlate=-1;
-
- Int_t isector = GetSector(pos);
- if(isector == -1){
- AliError("Detector Index could not be determined");
- return iPlate;}
-
- Float_t x = pos[0];
- Float_t y = pos[1];
- Float_t z = pos[2];
-
- Float_t rho=TMath::Sqrt(x*x+y*y);
- Float_t phi=TMath::ATan2(y,x);
- if(phi<0) phi=2.*TMath::Pi()+phi;
- // Get the local angle in the sector philoc
- Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec;
- philoc*=TMath::Pi()/180.;
- // theta projected on the median of the sector
- Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z);
-
- for (Int_t i=0; i<kNPlates; i++){
- if ( GetMaxPlateTheta(i) >= theta &&
- GetMinPlateTheta(i) <= theta)iPlate=i;
- }
-
- return iPlate;
-
-}
-//_____________________________________________________________________________
-Int_t AliTOFGeometry::GetStrip(Float_t *pos)
-{
- //
- // Returns the Strip index
- //
-
- Int_t iStrip=-1;
-
-
- Int_t isector = GetSector(pos);
- if(isector == -1){
- AliError("Detector Index could not be determined");
- return iStrip;}
- Int_t iplate = GetPlate(pos);
- if(iplate == -1){
- AliError("Detector Index could not be determined");
- return iStrip;}
-
-
- Float_t x = pos[0];
- Float_t y = pos[1];
- Float_t z = pos[2];
-
- Int_t nstrips=0;
- if(iplate==0 || iplate == 4)nstrips=kNStripC;
- if(iplate==1 || iplate == 3)nstrips=kNStripB;
- if(iplate==2) nstrips=kNStripA;
-
- Float_t rho=TMath::Sqrt(x*x+y*y);
- Float_t phi=TMath::ATan2(y,x);
- if(phi<0) phi=2.*TMath::Pi()+phi;
- // Get the local angle in the sector philoc
- Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec;
- philoc*=TMath::Pi()/180.;
- // theta projected on the median of the sector
- Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z);
-
- for (Int_t istrip=0; istrip<nstrips; istrip++){
-
- if(
- GetMaxStripTheta(iplate,istrip) >= theta
- &&
- GetMinStripTheta(iplate,istrip) <= theta ) iStrip = istrip;
-
- }
-
- return iStrip;
-}
-//_____________________________________________________________________________
-Int_t AliTOFGeometry::GetPadZ(Float_t *pos)
-{
- //
- // Returns the Pad index along Z
- //
- Int_t iPadZ = -1;
-
- Int_t isector = GetSector(pos);
- if(isector == -1){
- AliError("Detector Index could not be determined");
- return iPadZ;}
- Int_t iplate = GetPlate(pos);
- if(iplate == -1){
- AliError("Detector Index could not be determined");
- return iPadZ;}
- Int_t istrip = GetStrip(pos);
- if(istrip == -1){
- AliError("Detector Index could not be determined");
- return iPadZ;}
-
-
- Float_t x = pos[0];
- Float_t y = pos[1];
- Float_t z = pos[2];
-
- Float_t rho=TMath::Sqrt(x*x+y*y);
- Float_t phi=TMath::ATan2(y,x);
- if(phi<0) phi=2.*TMath::Pi()+phi;
- Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec;
- philoc*=TMath::Pi()/180.;
- Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z);
-
- if (theta >= GetStripTheta(iplate, istrip))iPadZ=1;
- else iPadZ=0;
-
- return iPadZ;
-}
-//_____________________________________________________________________________
-Float_t AliTOFGeometry::GetMinPlateTheta(Int_t iPlate)
-{
- //
- // Returns the minimum theta angle of a given plate iPlate (rad)
- //
-
-
- Int_t index=0;
-
- Float_t delta =0.;
- if(iPlate==0)delta = -1. ;
- if(iPlate==1)delta = -0.5;
- if(iPlate==3)delta = +0.5;
- if(iPlate==4)delta = +1. ;
-
- Float_t z=(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][index]/kRaddeg)+delta;
- Float_t r=(fgkRmin+fgkRmax)/2.+fHeights[iPlate][index];
- z =z+fgkZPad*TMath::Cos(fAngles[iPlate][index]/kRaddeg);
- r =r-fgkZPad*TMath::Sin(fAngles[iPlate][index]/kRaddeg);
-
- Float_t thmin = 0.5*TMath::Pi()-TMath::ATan(z/r)-fgkDprecMin;
- return thmin;
-
-}
-//_____________________________________________________________________________
-Float_t AliTOFGeometry::GetMaxPlateTheta(Int_t iPlate)
-{
- //
- // Returns the maximum theta angle of a given plate iPlate (rad)
-
- Int_t index=0;
- if(iPlate==0 ||iPlate == 4)index=kNStripC-1;
- if(iPlate==1 ||iPlate == 3)index=kNStripB-1;
- if(iPlate==2) index=kNStripA-1;
-
- Float_t delta =0.;
- if(iPlate==0)delta = -1. ;
- if(iPlate==1)delta = -0.5;
- if(iPlate==3)delta = +0.5;
- if(iPlate==4)delta = +1. ;
-
- Float_t z=(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][index]/kRaddeg)+delta;
- Float_t r=(fgkRmin+fgkRmax)/2.+fHeights[iPlate][index];
- z =z-fgkZPad*TMath::Cos(fAngles[iPlate][index]/kRaddeg);
- r= r+fgkZPad*TMath::Sin(fAngles[iPlate][index]/kRaddeg);
-
- Float_t thmax = 0.5*TMath::Pi()-TMath::ATan(z/r)+fgkDprecMax;
- return thmax;
-
-}
-//_____________________________________________________________________________
-Float_t AliTOFGeometry::GetMaxStripTheta(Int_t iPlate, Int_t iStrip)
-{
- //
- // Returns the maximum theta angle of a given strip iStrip (rad)
- //
-
-
- Float_t delta =0.;
- if(iPlate==0)delta = -1. ;
- if(iPlate==1)delta = -0.5;
- if(iPlate==3)delta = +0.5;
- if(iPlate==4)delta = +1. ;
-
- Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip];
- Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta;
- z = z-fgkZPad*TMath::Cos(fAngles[iPlate][iStrip]/kRaddeg);
- r = r+fgkZPad*TMath::Sin(fAngles[iPlate][iStrip]/kRaddeg);
- Float_t thmax =0.5*TMath::Pi()-TMath::ATan(z/r)+fgkDprecMax;
- return thmax;
-
-}
-
-//_____________________________________________________________________________
-Float_t AliTOFGeometry::GetMinStripTheta(Int_t iPlate, Int_t iStrip)
-{
- //
- // Returns the minimum theta angle of a given Strip iStrip (rad)
- //
-
-
- Float_t delta =0.;
- if(iPlate==0)delta = -1. ;
- if(iPlate==1)delta = -0.5;
- if(iPlate==3)delta = +0.5;
- if(iPlate==4)delta = +1. ;
-
-
- Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip];
- Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta;
- z =z+fgkZPad*TMath::Cos(fAngles[iPlate][iStrip]/kRaddeg);
- r =r-fgkZPad*TMath::Sin(fAngles[iPlate][iStrip]/kRaddeg);
- Float_t thmin =0.5*TMath::Pi()-TMath::ATan(z/r)-fgkDprecMin;
-
- return thmin;
-
-}
-
-
-//_____________________________________________________________________________
-Float_t AliTOFGeometry::GetStripTheta(Int_t iPlate, Int_t iStrip)
-{
- //
- // returns the median theta angle of a given strip iStrip (rad)
- //
-
-
- Float_t delta =0.;
- if(iPlate==0)delta = -1. ;
- if(iPlate==1)delta = -0.5;
- if(iPlate==3)delta = +0.5;
- if(iPlate==4)delta = +1. ;
-
- Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip];
- Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta;
- Float_t theta =0.5*TMath::Pi()-TMath::ATan(z/r);
- if(iPlate != 2){
- if(theta > 0.5*TMath::Pi() )theta+=fgkDprecCen;
- if(theta < 0.5*TMath::Pi() )theta-=fgkDprecCen;
- }
- return theta;
-}
-
-
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff